Smoke-consuming furnace



(No Model.)

J. BEAN SMOKE 00 2 Sheets-Sheefil.

& G. BEAL.

ING FURNACE.

Patented Nov. 30, 1897.

i k A M Q *1 g lm/niomz' JZhn Bran/J (No Model.) 2 Sheets-Sheet 2.

J. BRANDON & G. BEAL. SMOKE OONSUMING FURNACE.

No. 594,675. Patented Nov 30,1897.

iv Z NrrEn JOHN BRANDON AND GEORGE BEAL, OF LEAvENwoRrH, KANSAS.

SMOKE-CONSUMING FURNACE.

SPECIFICATION forming part of Letters Patent No. 594,67 5, dated.November 30, 1897.

Application filed January 16, 1897. Serial No. 619,442. (No model.)

To all whom it may concern:

Be it known that we, JOHN BRANDON and GEORGE BEAL, of Leavenworth,Leavenworth county, Kansas, have invented certain new and usefulImprovements in Smoke-Oonsumin gFurnaces, of which the following is afull, clear, and exact description, reference being bad to theaccompanying drawings, forming a part thereof.

Our invention relates to smoke-consuming furnaces; and it consists incertain novel and peculiar features of construction and combination ofparts, hereinafter described and claimed.

The object of the invention is to intensify the combustion by feeding tothe fire heated air and steam that the products of combustion whichwould otherwise escape may be consumed. This of course would obviate thesmoke nuisance in cities in a large degree at least and also wouldresult in a more economical consumption of fuel/ In order that theinvention may be fully understood, we will proceed to describe it withreference to the accom panyin g drawings, in which-- Figure 1 representsavertical longitudinal section of afurnace embodying ourinvention. Fig.2 is a horizontal section of the same. Fig. 3 is an enlarged section ofparts of the apparatus.

In the said drawings,1 designates a furnace.

2 designates the bridge-wall therein.

3 designates the grate.

4 designates a boiler supported therein in the customary or any othersuitable manner.

5 designates the steam-dome of the boiler.

6 designates a pipe which extends transversely and horizontally throughthe front wall of the furnace. Said pipe consists really of a number ofshort sections joined together by means of tubular couplings 7, andprojecting inwardly and slightly downward, by preference, from saidcouplings are the discharge pipes or nozzles 8. Said pipes or nozzlesterminate flush with the inner surface of the wall of the furnace andare adapted to discharge the gas formed bya mixture of steam and hot airdirectly over the fire and into the products of combustion. The oppositeends of the pipe 6 are provided with controllingreadily understood.

valves 0 and are connected with the lower ends of the vertical pipes 10.The pipes 10, which we term-the cold-air pipes, extend, preferably, upthrough the building to the outer air.

l1 designates a pair of hot-air pipes which extend longitudinallythrough the furnace and against the sides of the boiler. The rear endsare open to receive air, While their front ends are coupled to thevertical pipes 12, built in the front wall. The pipes 12 are coupled attheir lower ends to the pipes 6 at opposite sides of the series ofnozzles 8 and are controlled by means of valves 13..

14 designates a horizontal pipe composed of sections connected togetherby three-way couplings 15, and said couplings are provided withdischarge-nozzles 16, which project into the couplings 7 and terminateat the mouth of the nozzles 8, thus extending clear across the passageof the couplings and the pipe 6, for a purpose which will be presentlyexplained. One end of the pipe 14. is provided with an elbow 17, fromwhich projects the end nozzle 16 into one of the couplings 7, while theopposite end of said pipe 14 is coupled to a vertical pipe 18,controlled by a valve 19, and said pipe in turn is coupled to a pipe 20,which communicates with the interior of the steam-dome 5. By thisarrangement it is obvious that when steam is up and the various valvesare open the pressure within the boiler forces the steam through thenozzles 16 and 8, and thereby creates a suction action in the pipe 6,which obviously draws air through pipes 10 and 11 and discharges itmixed with steam into the products of combustion as they rise from thefire.

This arrangement of steam-pipes acts on the principle of asteam-injector, as will be The air is heated by being drawn through thepipes 11, which extend through the furnace and in direct contact withthe highly-heated boiler. The fresh cold air which is drawn down throughthe pipes 10 mixes with the hot air drawn up through the pipes 11 and isdischarged therewith at a suit-' able temperature over the fire, asindicated by arrows in Fig. 1. It will be seen by this arrangement alsothat commingled jets of air and steam are distributed over the entiresurface of the fire, so as to be more effective and reliable in theconsumption of the entire product of combustion.

It will be noted that by conducting air from the outside of the buildingto the furnace better results will be had than by utilizing the pinterior air altogether, as the latter has been deprived of a portion ofits oxygen.

If it is found that too much air is blown into the furnace for thequantity of steam, or vice versa, the Valves of course may bemanipulated accordingly-that is to say, if too lings 7, nozzles 8secured to said couplings and arranged to discharge into the fire-box, avalve-controlled pipe, 10, connected to each end of the said transversepipe, and open to the entrance of outside air at their opposite ends, apair of valve-controlled pipes 12, set in the front wall of the furnaceand coupled to the transverse pipe at their lower ends, a pair ofhot-air pipes 11, resting against the boiler and having their front endscoupled to the upper ends of pipes 12, and their rear ends open, asecond transverse pipe, 14, parallel with the other and arranged infront of the furnace, nozzles 16, projecting from said pipe into thecouplings 7, and clear across their transverse passages, and valve-controlled pipes connecting the transverse pipe 14:, to the steam-domeof the boiler, substantially as described.

In testimony whereof we affix our signatures in the presence of twowitnesses.

JOHN BRANDON. GEORGE BEAL. Witnesses:

HENRY SHINDLER, RICHARD J OLEARY.

